Polarized Neutron Reflectometry in specular and off-specular mode: some
results looking at magnetic thin films and interfaces
Dr. Saibal Basu, SUNY Stonybrook
The talk will focus on the results obtained from a polarized neutron
reflectometer for vertical samples, that has been installed at the
reactor DHRUVA at BARC, Trombay, India. This reactor has peak flux
of 1.4 × 1014 n/cm2/s and has two curved
neutron guides. The present reflectometer is on one of the guides,
using a monochromatic beam of 2.5 Å. We have determined physical
density profiles as well as magnetic moment density profiles using
this reflectometer for several magnetic/non-magnetic viz., Fe/Ge
and Cu/Ni multilayer samples. These results will be presented.
Since this reflectometer uses a horizontal PSD that collects all
data in the plane of reflection, we can also carry out off-specular
reflectivity studies quite conveniently. Some interesting results
from unpolarized and polarized off-specular reflectivity will
also be presented.
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